Claim · model-written summary
Authors interpret N2 fixation as enabling encroachers to meet immediate nitrogen demands under water limitation and increasing CO2.
- Taxon
- African savanna treest0
- Outcome
- meet immediate N demandse0
- Direction
- increasese0
- Qualifier
- N2 fixation increases plant-available Ne0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValue
Verbatim
e0“N2 fixation increases plant-available N, likely enabling encroachers to meet immediate N demands even under water limitation and increasing CO2”
t0“African savanna trees”
Title
N2 fixation is linked to the ability to encroach in African savanna trees
Telford, E.M.; Simpson, K.; Street, L.; et al. White Rose Research Online (University of Leeds, The University of Sheffield, University of York) 2026
Other claims from this paper (7)
- Observation Encroachers had lower leaf δ15N than non-encroachers.
- Observation Nodule mass fraction, stem δ15N and percentage of N from fixation were similar across encroachers and non-encroachers.
- Intervention effect Plants fixed more N2 under elevated CO2.
- Intervention effect Plants fixed more N2 under well-watered conditions.
- Association Leaf and stem δ15N were unrelated in encroachers.
- Association Leaf and stem δ15N were positively related in non-encroachers.
- Mechanism Authors propose that elevated CO2 enhances photosynthesis and carbon allocation for N2 fixation, helping explain encroachment.